/** * @file lltextureatlas.h * @brief LLTextureAtlas base class. * * $LicenseInfo:firstyear=2002&license=viewergpl$ * * Copyright (c) 2002-2009, Linden Research, Inc. * * Second Life Viewer Source Code * The source code in this file ("Source Code") is provided by Linden Lab * to you under the terms of the GNU General Public License, version 2.0 * ("GPL"), unless you have obtained a separate licensing agreement * ("Other License"), formally executed by you and Linden Lab. Terms of * the GPL can be found in doc/GPL-license.txt in this distribution, or * online at http://secondlife.com/developers/opensource/gplv2 * * There are special exceptions to the terms and conditions of the GPL as * it is applied to this Source Code. View the full text of the exception * in the file doc/FLOSS-exception.txt in this software distribution, or * online at http://secondlife.com/developers/opensource/flossexception * * By copying, modifying or distributing this software, you acknowledge * that you have read and understood your obligations described above, * and agree to abide by those obligations. * * ALL LINDEN LAB SOURCE CODE IS PROVIDED "AS IS." LINDEN LAB MAKES NO * WARRANTIES, EXPRESS, IMPLIED OR OTHERWISE, REGARDING ITS ACCURACY, * COMPLETENESS OR PERFORMANCE. * $/LicenseInfo$ */ #ifndef LL_TEXTUREATLAS_H #define LL_TEXTUREATLAS_H #include "llviewertexture.h" class LLSpatialGroup ; class LLTextureAtlas : public LLViewerTexture { protected: /*virtual*/ ~LLTextureAtlas() ; public: LLTextureAtlas(U8 ncomponents, S16 atlas_dim = 16) ; /*virtual*/ S8 getType() const; LLGLuint insertSubTexture(LLImageGL* source_gl_tex, S32 discard_level, const LLImageRaw* raw_image, S16 slot_col, S16 slot_row) ; void releaseSlot(S16 slot_col, S16 slot_row, S8 slot_width); BOOL getNextAvailableSlot(S8 bits_len, S16& col, S16& row) ; void getTexCoordOffset(S16 col, S16 row, F32& xoffset, F32& yOffset) ; void getTexCoordScale(S32 w, S32 h, F32& xscale, F32& yscale) ; BOOL isEmpty() const ; BOOL isFull(S8 to_be_reserved = 1) const ; F32 getFullness() const ; void addSpatialGroup(LLSpatialGroup* groupp) ; void removeSpatialGroup(LLSpatialGroup* groupp) ; LLSpatialGroup* getLastSpatialGroup() ; void removeLastSpatialGroup() ; BOOL hasSpatialGroup(LLSpatialGroup* groupp) ; void clearSpatialGroup() ; std::list<LLSpatialGroup*>* getSpatialGroupList() {return &mSpatialGroupList;} private: void generateEmptyUsageBits() ; void releaseUsageBits() ; void markUsageBits(S8 bits_len, U8 mask, S16 col, S16 row) ; void unmarkUsageBits(S8 bits_len, S16 col, S16 row) ; void getPositionFromIndex(S16 index, S16& col, S16& row) ; void getIndexFromPosition(S16 col, S16 row, S16& index) ; BOOL areUsageBitsMarked(S8 bits_len, U8 mask, S16 col, S16 row) ; private: S16 mAtlasDim ; //number of slots per edge, i.e, there are "mAtlasDim * mAtlasDim" total slots in the atlas. S16 mNumSlotsReserved ; S16 mMaxSlotsInAtlas ; U8 **mUsageBits ; std::list<LLSpatialGroup*> mSpatialGroupList ; public: //debug use only U8 **mTestBits ; public: static S16 sMaxSubTextureSize ; static S16 sSlotSize ; }; #endif